This product is part of the Harmony 9001K range, an offer of metal pushbuttons, switches and piolt lights. It is impact resistant, dust resistant, water resistant and vibration resistant, making it ideal for operation in harsh environments It is easily installed into a standard 30mm diameter panel cut-outs and is easily connected to control circuits International standards & certifications (Marine ABS certification, IP20, Type 1, 2, 3, 3R, 4, 12 and 13)